/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef FUNCTIONSYSTEM_META_STORE_WATCHER_H
#define FUNCTIONSYSTEM_META_STORE_WATCHER_H

#include <cstdint>
#include <functional>

namespace functionsystem {
class Watcher {
public:
    Watcher() = default;

    explicit Watcher(const std::function<void(int64_t)> &method);

    ~Watcher() = default;

    [[nodiscard]] int64_t GetWatchId() const;

    void SetWatchId(int64_t watchId);

    [[nodiscard]] bool IsCanceled() const;

    // cancel observer
    void Close() noexcept;

    void Reset() noexcept;

private:
    bool canceled_ = false;  // for close

    int64_t watchId_ = -1;  // for close

    std::function<void(int64_t)> closeMethod_;
};
}  // namespace functionsystem

#endif  // FUNCTIONSYSTEM_META_STORE_WATCHER_H
